* {
  /* 采用怪异模式下的盒模型：元素的总高度和宽度包含内边距和边框(padding与border)  */
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  /* 没有滚动条 */
  overflow: hidden;
}

.section {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  min-height: 100vh;
  background: linear-gradient(135deg, #111, #222, #111);
}
.section::before {
  content: "";
  position: absolute;
  width: 30vw;
  height: 30vw;
  /* 红色边框 */
  border: 5vw solid #ff1062;
  /* 圆形边框 */
  border-radius: 50%;
  /* 为边框添加2个下拉阴影 */
  box-shadow: 0 0 0 1vw #222, 0 0 0 1.3vw #fff;
}
.section .section__title {
  position: absolute;
  transform: skewY(-7deg);
  z-index: 10;
  color: #fff;
  text-align: center;
  font-size: 9vw;
  line-height: 2em;
  text-shadow: 1px 1px 0 #ccc, 2px 2px 0 #ccc, 3px 3px 0 #ccc, 4px 4px 0 #ccc,
    5px 5px 0 #ccc, 10px 10px 0 rgba(0, 0, 0, 0.2);
  animation: floating 5s ease-in-out infinite;
}
.section .section__title span {
  text-shadow: 1px 1px 0 #ccc, 2px 2px 0 #ccc, 3px 3px 0 #ccc, 4px 4px 0 #ccc,
    5px 5px 0 #ccc, 6px 6px 0 #ccc, 7px 7px 0 #ccc, 8px 8px 0 #ccc,
    9px 9px 0 #ccc, 20px 20px 0 rgba(0, 0, 0, 0.2);
  font-weight: 700;
  font-size: 3em;
}
.section i {
  position: absolute;
  background: #fff;
  border-radius: 50%;
  box-shadow: 0 0 10px #fff, 0 0 20px #fff, 0 0 40px #fff, 0 0 80px #fff;
  animation: animate linear infinite;
}

@keyframes floating {
  0%,
  100% {
    transform: skewY(-7deg) translate(0, -20px);
  }
  50% {
    transform: skewY(-7deg) translate(0, 20px);
  }
}
/* 利用透明度设置星星明暗变化的动画效果 */
@keyframes animate {
  0% {
    opacity: 0;
  }
  10% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}
